Question

Leticia simplified an expression. Her work is shown below.

4.5÷1/4+2 1/2-.75×8
Step 1 18+2 1/2-0.75×8
Step 2 18+1.75×8
Step 3 18+14
Step 4 32
Where did Leticia make her first mistake?
step 1
step 2
step 3
step 4

Answer 1

answer is b

Explanation:

Answer 2

Option 2 - Step 2

Explanation:

Given : Leticia simplified an expression. Her work is shown below.

Expression -
`4.5/ (1)/(4)+2(1)/(2)-.75* 8`

Step 1 -
`18+2(1)/(2)-.75* 8`

Step 2 -
`18+1.75* 8`

Step 3 -
`18+14`

Step 4 -
`32`

To find : Where did Leticia make her first mistake?

Solution :

Expression -
`4.5/ (1)/(4)+2(1)/(2)-.75* 8`

Step 1 -
`18+2(1)/(2)-0.75* 8`

As
`4.5/ (1)/(4) =18` Step 1 is correct.

Step 2-
`18+1.75* 8`

Step 2 is in correct first we solve multiply term.

Now steps are as follow,

Step 2 -
`18+2(1)/(2)-6`

As
`0.75* 8=6`

Step 3 -
`20.5-6`

As
`18+2(1)/(2)=20.5`

Step 4 -
`20.5-6`

As
`20.5-6=14.5`

Therefore, Step 2 is incorrect.

So, option 2 is correct.